instiki/public/svg-edit/editor/extensions/ext-grid.js

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2010-09-10 22:19:23 +02:00
/*
* ext-grid.js
*
* Licensed under the Apache License, Version 2
*
* Copyright(c) 2010 Redou Mine
*
*/
svgEditor.addExtension("view_grid", function(s) {
/*
* Config for grid-lines
*/
var gridConfig = {
'1x1': { height: 1, width: 1, color: '#CCC', strokeWidth: 0.05, opacity: 1 },
'5x5': { height: 5, width: 5, color: '#BBB', strokeWidth: 0.2, opacity: 1 },
'10x10': { height: 10, width: 10, color: '#AAA', strokeWidth: 0.2, opacity: 1 },
'100x100': { height: 100, width: 100, color: '#888', strokeWidth: 0.2, opacity: 1 }
};
var svgdoc = document.getElementById("svgcanvas").ownerDocument,
svgns = "http://www.w3.org/2000/svg",
dims = svgEditor.curConfig.dimensions,
svgroot = s.svgroot;
/*
* copied from svgcanvas.js line 1138-1157 (version: 2.5 rc1)
*/
var assignAttributes = function(node, attrs, suspendLength, unitCheck) {
if (!suspendLength) suspendLength = 0;
// Opera has a problem with suspendRedraw() apparently
var handle = null;
if (!window.opera) svgroot.suspendRedraw(suspendLength);
for (var i in attrs) {
var ns = (i.substr(0, 4) == "xml:" ? xmlns :
i.substr(0, 6) == "xlink:" ? xlinkns : null);
if (ns || !unitCheck) {
node.setAttributeNS(ns, i, attrs[i]);
} else {
setUnitAttr(node, i, attrs[i]);
}
}
if (!window.opera) svgroot.unsuspendRedraw(handle);
};
// create svg for grid
var canvasgrid = svgdoc.createElementNS(svgns, "svg");
assignAttributes(canvasgrid, {
'id': 'canvasGrid',
'width': '100%',
'height': '100%',
'x': 0,
'y': 0,
'overflow': 'visible',
'viewBox': '0 0 ' + dims[0] + ' ' + dims[1],
'display': 'none'
});
$('#canvasBackground').append(canvasgrid);
// create each grid
$.each(gridConfig, function(key, value) {
// grid-pattern
var gridPattern = svgdoc.createElementNS(svgns, "pattern");
assignAttributes(gridPattern, {
'id': 'gridpattern' + key,
'patternUnits': 'userSpaceOnUse',
'x': -(value.strokeWidth / 2), // position for strokewidth
'y': -(value.strokeWidth / 2), // position for strokewidth
'width': value.width,
'height': value.height
});
var gridPattern_hoLine = svgdoc.createElementNS(svgns, "line");
assignAttributes(gridPattern_hoLine, {
'fill': 'none',
'stroke-width': value.strokeWidth,
'x1': 0,
'y1': 0,
'x2': value.width,
'y2': 0,
'stroke': value.color
});
var gridPattern_veLine = svgdoc.createElementNS(svgns, "line");
assignAttributes(gridPattern_veLine, {
'fill': 'none',
'stroke-width': value.strokeWidth,
'x1': 0,
'y1': 0,
'x2': 0,
'y2': value.height,
'stroke': value.color
});
gridPattern.appendChild(gridPattern_hoLine);
gridPattern.appendChild(gridPattern_veLine);
$('#svgroot defs').append(gridPattern);
// grid-box
var gridBox = svgdoc.createElementNS(svgns, "rect");
assignAttributes(gridBox, {
'width': '100%',
'height': '100%',
'x': 0,
'y': 0,
'stroke-width': 0,
'stroke': 'none',
'fill': 'url(#gridpattern' + key + ')',
'opacity': value.opacity,
'style': 'pointer-events: none; display:visible;'
});
$('#canvasGrid').append(gridBox);
});
return {
name: "view_grid",
svgicons: "extensions/grid-icon.xml",
zoomChanged: function(zoomlevel) {
// update size
var viewBox = "0 0 " + svgCanvas.contentW + " " + svgCanvas.contentH;
$('#canvasGrid').attr("viewBox", viewBox);
},
buttons: [{
id: "view_grid",
type: "context",
panel: "editor_panel",
title: "Show/Hide Grid [G]",
events: {
'click': function() {
var gr = !$('#view_grid').hasClass('push_button_pressed');
if (gr) {
svgEditor.curConfig.gridSnapping = true;
$('#view_grid').addClass('push_button_pressed').removeClass('tool_button');
$('#canvasGrid').attr('display', 'normal');
}
else {
svgEditor.curConfig.gridSnapping = false;
$('#view_grid').removeClass('push_button_pressed').addClass('tool_button');
$('#canvasGrid').attr('display', 'none');
}
}
}
}]
};
});